EP 3862956 B1 20240103 - SECURE MULTIPARTY LOSS RESISTANT STORAGE AND TRANSFER OF CRYPTOGRAPHIC KEYS FOR BLOCKCHAIN BASED SYSTEMS IN CONJUNCTION WITH A WALLET MANAGEMENT SYSTEM
Title (en)
SECURE MULTIPARTY LOSS RESISTANT STORAGE AND TRANSFER OF CRYPTOGRAPHIC KEYS FOR BLOCKCHAIN BASED SYSTEMS IN CONJUNCTION WITH A WALLET MANAGEMENT SYSTEM
Title (de)
SICHERER VERLUSTRESISTENTER MEHRPARTEIENSPEICHER UND TRANSFER VON KRYPTOGRAFISCHEN SCHLÜSSELN FÜR BLOCKCHAIN-BASIERTE SYSTEME IN VERBINDUNG MIT EINEM GELDBÖRSENVERWALTUNGSSYSTEM
Title (fr)
STOCKAGE SÉCURISÉ RÉSISTANT À UNE PERTE MULTIPARTITE ET TRANSFERT DE CLÉS CRYPTOGRAPHIQUES POUR DES SYSTÈMES BASÉS SUR UNE CHAÎNE DE BLOCS CONJOINTEMENT AVEC UN SYSTÈME DE GESTION DE PORTEFEUILLE
Publication
Application
Priority
- GB 201603117 A 20160223
- GB 201605026 A 20160324
- GB 201619301 A 20161115
- EP 17707121 A 20170214
- IB 2017050829 W 20170214
Abstract (en)
[origin: WO2017145010A1] The invention provides a computer- implemented solution for controlling access to a computer-related resource such as, for example, a digital wallet. In one or more embodiments, the wallet may be implemented using a blockchain such as the Bitcoin blockchain but the invention is not limited in this regard. Use of the invention during the initial set-up of the wallet can enable subsequent operations such as wallet transactions to be handled in a secure manner over an insecure channel such as the internet. A method according to an embodiment of the invention can comprise the steps of splitting a verification element (such as a private key in an asymmetric cryptography pair) into a plurality of shares; determining a common secret at two or more nodes in a network; and using the common secret to transmit at least one share of the verification element between the two or more nodes. The shares can be split such that no share on its own is sufficient to arrive at the verification element. This means that no one party stores the entire private key, providing for enhanced security of the key. Two or more shares are required to restore the key. The shares are stored at separate locations one of which is an independent back-up or safe-storage location. If one of the other shares becomes unavailable, the share can be retrieved from back up to ensure that the key (and thus the controlled resource) is still accessible. To ensure safe transmission of the share(s), the common secret is generated at two different nodes independently of each other and then used to generate an encryption key. The encryption key can be used to encrypt at least one share of the verification element, or a message comprising it, to ensure that the share(s) are transmitted securely.
IPC 8 full level
G06Q 20/36 (2012.01); G06Q 20/38 (2012.01); H04L 9/08 (2006.01); H04L 9/30 (2006.01)
CPC (source: EP GB IL KR US)
G06Q 20/36 (2013.01 - GB); G06Q 20/3678 (2013.01 - EP IL KR US); G06Q 20/38 (2013.01 - GB); G06Q 20/3829 (2013.01 - EP IL KR US); G06Q 20/389 (2013.01 - IL); H04L 9/08 (2013.01 - GB); H04L 9/0825 (2013.01 - IL US); H04L 9/0838 (2013.01 - EP); H04L 9/0841 (2013.01 - GB); H04L 9/085 (2013.01 - EP GB IL US); H04L 9/0861 (2013.01 - EP IL US); H04L 9/0894 (2013.01 - IL US); H04L 9/3066 (2013.01 - EP IL US); H04L 9/32 (2013.01 - GB); H04L 9/3242 (2013.01 - GB); H04L 9/3247 (2013.01 - IL US); H04L 9/3252 (2013.01 - IL); H04L 63/0442 (2013.01 - IL US); G06Q 2220/00 (2013.01 - EP IL US); H04L 9/3252 (2013.01 - US); H04L 2209/56 (2013.01 - EP IL KR US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2017145010 A1 20170831; AU 2017223129 A1 20180712; AU 2022291434 A1 20230216; BR 112018016234 A2 20190102; CA 3009731 A1 20170831; CA 3009731 C 20240409; CL 2018002362 A1 20181123; CN 108352015 A 20180731; CN 108352015 B 20220201; CN 114282928 A 20220405; CO 2018008191 A2 20180821; EP 3259724 A1 20171227; EP 3259724 B1 20210324; EP 3862956 A1 20210811; EP 3862956 B1 20240103; EP 4274154 A2 20231108; EP 4274154 A3 20231220; EP 4383643 A2 20240612; GB 201806742 D0 20180606; GB 2561729 A 20181024; IL 260909 B 20210831; IL 276271 A 20200930; IL 276271 B 20210630; JP 2019509648 A 20190404; JP 2021044828 A 20210318; JP 2022183325 A 20221208; JP 6799061 B2 20201209; JP 7164580 B2 20221101; JP 7164580 B6 20221128; KR 20180115701 A 20181023; MX 2018009355 A 20181219; PH 12018550108 A1 20190318; SG 10202112185T A 20211230; SG 11201805542T A 20180927; TW 201733302 A 20170916; TW 202127830 A 20210716; TW I722116 B 20210321; TW I748853 B 20211201; US 10659223 B2 20200519; US 11621833 B2 20230404; US 2018367298 A1 20181220; US 2020280433 A1 20200903; US 2023208627 A1 20230629; ZA 202003745 B 20220126
DOCDB simple family (application)
IB 2017050829 W 20170214; AU 2017223129 A 20170214; AU 2022291434 A 20221219; BR 112018016234 A 20170214; CA 3009731 A 20170214; CL 2018002362 A 20180817; CN 201780003338 A 20170214; CN 202210030094 A 20170214; CO 2018008191 A 20180802; EP 17707121 A 20170214; EP 21152898 A 20170214; EP 23194461 A 20170214; EP 24172243 A 20170214; GB 201806742 A 20170214; IL 26090918 A 20180731; IL 27627120 A 20200725; JP 2018522105 A 20170214; JP 2020192327 A 20201119; JP 2022168202 A 20221020; KR 20187024173 A 20170214; MX 2018009355 A 20170214; PH 12018550108 A 20180705; SG 10202112185T A 20170214; SG 11201805542T A 20170214; TW 106105706 A 20170221; TW 110102532 A 20170221; US 201816111022 A 20180823; US 202016875796 A 20200515; US 202318118086 A 20230306; ZA 202003745 A 20200622